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    <title>GROOPS - PreprocessingSst</title>

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            <h1>PreprocessingSst</h1><p>

This programs processes satellite-to-satellite-tracking (SST) and orbit observations in a GRACE like configuration.
Three different observation groups are considered separatly: SST and POD1/POD2 for the two satellites.
This program works similar to <a class="groops-program" href="PreprocessingPod.html">PreprocessingPod</a>, see there for details. Here only deviations
in the settings are explained.</p><p>Precise orbit data (POD) contain often systematic errors additional to stochastic noise. In this case the
variance component estimation fails and assign too much weight to the data. Therefore an additional
<strong class="groops-config-element">downweightPod</strong> factor can be applied to the standard deviation of POD for the next least squares adjustment
in the iteration. This factor should also applied as <strong class="groops-config-element">sigma</strong> in <a class="groops-class" href="observationType.html">observation</a>
for computation of the final solution e.g. with <a class="groops-program" href="NormalsSolverVCE.html">NormalsSolverVCE</a>.</p><p>Daily variations (or other intervals) of the gravity field can be co-estimated together with the static/monthly
mean gravity field. The <a class="groops-class" href="parametrizationGravityType.html">covarianceSignal:parametrizationGravity</a>
describes the daily gravity field parameters and must agree with the parametrization of the covariance matrices.
Furthermore it must be part of
the <a class="groops-class" href="parametrizationGravityType.html">parametrizationGravity</a> selected in <strong class="groops-config-element">observation</strong>.
The intervals are defined in <strong class="groops-config-element">arcList</strong>, created by <a class="groops-program" href="InstrumentSynchronize.html">InstrumentSynchronize</a>.
These daily estimates must be constrained by providing
<strong class="groops-config-element">inputfileCovariance</strong> matrices in <strong class="groops-config-element">covarianceSignal</strong>. The first file provides the spatial signal
covariances and the second, third and so on files the spatial and temporal covariances between one day and the
next days respectively. The covariance matrices are the same as used in <a class="groops-program" href="KalmanFilter.html">KalmanFilter</a> and can be
generated with <a class="groops-program" href="Gravityfield2EmpiricalCovariance.html">Gravityfield2EmpiricalCovariance</a>. It is possible to scale the covariance matrices with
<strong class="groops-config-element">covarianceSignal:sigma</strong> and to estimate the factor by means of variance component estimation.
The daily (or in general interval) estimates can be written with <a class="groops-class" href="fileFormat_matrix.html">outputfileSolutionSignal</a>.
For every interval a file is written with an index appended (counting from zero) to the file name.
</p>
<table class="table table-hover">
<tr class="table-primary"><th>Name</th><th>Type</th><th>Annotation</th></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-0"><div class="h-100 config optional">outputfileSolution</div></div></td><td>filename</td><td>estimated parameter vector (static part only)</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-0"><div class="h-100 config optional">outputfileSigmax</div></div></td><td>filename</td><td>standard deviations of the parameters (sqrt of the diagonal of the inverse normal equation)</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-0"><div class="h-100 config optional">outputfileParameterName</div></div></td><td>filename</td><td>estimated signal parameters (index is appended)</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-0"><div class="h-100 config optional">outputfileSolutionHighFrequency</div></div></td><td>filename</td><td>estimated high-frequency gravity field parameters (index is appended for each interval)</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-0"><div class="h-100 config optional">outputfileSolutionInterval</div></div></td><td>filename</td><td>other interval parameters (index is appended)</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-0"><div class="h-100 config optional">estimateArcSigmas</div></div></td><td>sequence</td><td></td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">outputfileSigmasPerArcSst</div></div></td><td>filename</td><td>accuracies of each arc (SST)</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">outputfileSigmasPerArcPod1</div></div></td><td>filename</td><td>accuracies of each arc (POD1)</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">outputfileSigmasPerArcPod2</div></div></td><td>filename</td><td>accuracies of each arc (POD2)</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-0"><div class="h-100 config optional">estimateEpochSigmas</div></div></td><td>sequence</td><td></td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">outputfileSigmasPerEpochSst</div></div></td><td>filename</td><td>accuracies of each epoch (SST)</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">outputfileSigmasPerEpochPod1</div></div></td><td>filename</td><td>accuracies of each epoch (POD1)</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">outputfileSigmasPerEpochPod2</div></div></td><td>filename</td><td>accuracies of each epoch (POD2)</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-0"><div class="h-100 config optional">estimateCovarianceFunctions</div></div></td><td>sequence</td><td></td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">outputfileCovarianceFunctionSst</div></div></td><td>filename</td><td>covariance function</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">outputfileCovarianceFunctionPod1</div></div></td><td>filename</td><td>covariance functions for along, cross, radial direction</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">outputfileCovarianceFunctionPod2</div></div></td><td>filename</td><td>covariance functions for along, cross, radial direction</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-0"><div class="h-100 config optional">estimateSstArcWiseCovariancesVarianceFactors</div></div></td><td>sequence</td><td></td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">outputfileVarianceFactors</div></div></td><td>filename</td><td>one variance factor per matrix</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-0"><div class="h-100 config optional">computeResiduals</div></div></td><td>sequence</td><td></td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">outputfileSstResiduals</div></div></td><td>filename</td><td></td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">outputfilePod1Residuals</div></div></td><td>filename</td><td></td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">outputfilePod2Residuals</div></div></td><td>filename</td><td></td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-0"><div class="h-100 config mustset">observation</div></div></td><td>choice</td><td>obervation equations (Sst)</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config mustset">sstIntegral</div></div></td><td>sequence</td><td>integral approach</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config optional">inputfileSatelliteModel1</div></div></td><td>filename</td><td>satellite macro model</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config optional">inputfileSatelliteModel2</div></div></td><td>filename</td><td>satellite macro model</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config mustset-unbounded">rightHandSide</div></div></td><td><a href="sstRightSideType.html">sstRightSide</a></td><td>input for the reduced observation vector</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config mustset">sstType</div></div></td><td>choice</td><td></td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-3"><div class="h-100 config mustset">range</div></div></td><td></td><td></td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-3"><div class="h-100 config mustset">rangeRate</div></div></td><td></td><td></td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-3"><div class="h-100 config mustset">rangeAcceleration</div></div></td><td></td><td></td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-3"><div class="h-100 config mustset">none</div></div></td><td></td><td></td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config mustset">inputfileOrbit1</div></div></td><td>filename</td><td>used to evaluate the observation equations, not used as observations</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config mustset">inputfileOrbit2</div></div></td><td>filename</td><td>used to evaluate the observation equations, not used as observations</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config mustset">inputfileStarCamera1</div></div></td><td>filename</td><td></td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config mustset">inputfileStarCamera2</div></div></td><td>filename</td><td></td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config mustset">earthRotation</div></div></td><td><a href="earthRotationType.html">earthRotation</a></td><td></td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config optional">ephemerides</div></div></td><td><a href="ephemeridesType.html">ephemerides</a></td><td></td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config optional-unbounded">gradientfield</div></div></td><td><a href="gravityfieldType.html">gravityfield</a></td><td>low order field to estimate the change of the gravity by position adjustement</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config optional-unbounded">parametrizationGravity</div></div></td><td><a href="parametrizationGravityType.html">parametrizationGravity</a></td><td>gravity field parametrization</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config optional-unbounded">parametrizationAcceleration1</div></div></td><td><a href="parametrizationAccelerationType.html">parametrizationAcceleration</a></td><td>orbit1 force parameters</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config optional-unbounded">parametrizationAcceleration2</div></div></td><td><a href="parametrizationAccelerationType.html">parametrizationAcceleration</a></td><td>orbit2 force parameters</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config optional-unbounded">parametrizationSst</div></div></td><td><a href="parametrizationSatelliteTrackingType.html">parametrizationSatelliteTracking</a></td><td>satellite tracking parameter</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config optional">keepSatelliteStates</div></div></td><td>boolean</td><td>set boundary values of each arc global</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config optional">integrationDegree</div></div></td><td>uint</td><td>integration of forces by polynomial approximation of degree n</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config optional">interpolationDegree</div></div></td><td>uint</td><td>orbit interpolation by polynomial approximation of degree n</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config mustset">sstVariational</div></div></td><td>sequence</td><td>variational equations</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config mustset">rightHandSide</div></div></td><td>sequence</td><td>input for observation vectors</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-3"><div class="h-100 config optional-unbounded">inputfileSatelliteTracking</div></div></td><td>filename</td><td>ranging observations and corrections</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-3"><div class="h-100 config optional">inputfileOrbit1</div></div></td><td>filename</td><td>kinematic positions of satellite A as observations</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-3"><div class="h-100 config optional">inputfileOrbit2</div></div></td><td>filename</td><td>kinematic positions of satellite B as observations</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config mustset">sstType</div></div></td><td>choice</td><td></td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-3"><div class="h-100 config mustset">range</div></div></td><td></td><td></td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-3"><div class="h-100 config mustset">rangeRate</div></div></td><td></td><td></td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-3"><div class="h-100 config mustset">none</div></div></td><td></td><td></td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config mustset">inputfileVariational1</div></div></td><td>filename</td><td>approximate position and integrated state matrix</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config mustset">inputfileVariational2</div></div></td><td>filename</td><td>approximate position and integrated state matrix</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config optional">ephemerides</div></div></td><td><a href="ephemeridesType.html">ephemerides</a></td><td></td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config optional-unbounded">parametrizationGravity</div></div></td><td><a href="parametrizationGravityType.html">parametrizationGravity</a></td><td>gravity field parametrization</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config optional-unbounded">parametrizationAcceleration1</div></div></td><td><a href="parametrizationAccelerationType.html">parametrizationAcceleration</a></td><td>orbit1 force parameters</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config optional-unbounded">parametrizationAcceleration2</div></div></td><td><a href="parametrizationAccelerationType.html">parametrizationAcceleration</a></td><td>orbit2 force parameters</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config optional-unbounded">parametrizationSst</div></div></td><td><a href="parametrizationSatelliteTrackingType.html">parametrizationSatelliteTracking</a></td><td>satellite tracking parameter</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config optional">integrationDegree</div></div></td><td>uint</td><td>integration of forces by polynomial approximation of degree n</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config optional">interpolationDegree</div></div></td><td>uint</td><td>orbit interpolation by polynomial approximation of degree n</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-0"><div class="h-100 config mustset">covarianceSst</div></div></td><td>sequence</td><td></td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">sigma</div></div></td><td>double</td><td>apriori factor of covariance function</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">inputfileSigmasPerArc</div></div></td><td>filename</td><td>apriori different accuaries for each arc (multiplicated with sigma)</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">inputfileSigmasPerEpoch</div></div></td><td>filename</td><td>apriori different accuaries for each epoch</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">inputfileCovarianceFunction</div></div></td><td>filename</td><td>approximate covariances in time</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional-unbounded">inputfileCovarianceMatrixArc</div></div></td><td>filename</td><td>Must be given per sst arc with correct dimensions.</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">inputfileSigmasCovarianceMatrixArc</div></div></td><td>filename</td><td>Vector with one sigma for each <inputfileCovarianceMatrixArc></td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">sampling</div></div></td><td>double</td><td>[seconds] sampling of the covariance function</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-0"><div class="h-100 config mustset">covariancePod1</div></div></td><td>sequence</td><td></td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">sigma</div></div></td><td>double</td><td>apriori factor of covariance function</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">inputfileSigmasPerArc</div></div></td><td>filename</td><td>apriori different accuaries for each arc (multiplicated with sigma)</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">inputfileSigmasPerEpoch</div></div></td><td>filename</td><td>apriori different accuaries for each epoch</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">inputfileCovarianceFunction</div></div></td><td>filename</td><td>approximate covariances in time</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">inputfileCovariancePodEpoch</div></div></td><td>filename</td><td>3x3 epoch covariances</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">sampling</div></div></td><td>double</td><td>[seconds] sampling of the covariance function</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-0"><div class="h-100 config mustset">covariancePod2</div></div></td><td>sequence</td><td></td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">sigma</div></div></td><td>double</td><td>apriori factor of covariance function</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">inputfileSigmasPerArc</div></div></td><td>filename</td><td>apriori different accuaries for each arc (multiplicated with sigma)</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">inputfileSigmasPerEpoch</div></div></td><td>filename</td><td>apriori different accuaries for each epoch</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">inputfileCovarianceFunction</div></div></td><td>filename</td><td>approximate covariances in time</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">inputfileCovariancePodEpoch</div></div></td><td>filename</td><td>3x3 epoch covariances</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">sampling</div></div></td><td>double</td><td>[seconds] sampling of the covariance function</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-0"><div class="h-100 config optional">estimateHighFrequencyVariations</div></div></td><td>sequence</td><td>co-estimate high-frequency gravity field variations</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">estimateSigma</div></div></td><td>boolean</td><td>estimate factor of covariance  function (VCE)</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">sigma</div></div></td><td>double</td><td>a-priori standard deviation for AR model regularization</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config mustset">autoregressiveModelSequence</div></div></td><td><a href="autoregressiveModelSequenceType.html">autoregressiveModelSequence</a></td><td>AR model sequence for constraining high frequency gravity variations</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config mustset-unbounded">parametrization</div></div></td><td><a href="parametrizationGravityType.html">parametrizationGravity</a></td><td>must be set in observation too</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-0"><div class="h-100 config optional">inputfileArcList</div></div></td><td>filename</td><td>list to correspond points of time to arc numbers</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-0"><div class="h-100 config optional">adjustmentThreshold</div></div></td><td>double</td><td>Adjustment factor threshold: Iteration will be stopped once both SST and POD adjustment factors are under this threshold</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-0"><div class="h-100 config optional">iterationCount</div></div></td><td>uint</td><td>(maximum) number of iterations for the estimation of calibration parameter and error PSD</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-0"><div class="h-100 config optional">downweightPod</div></div></td><td>double</td><td>downweight factor for POD</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-0"><div class="h-100 config optional">variableNameIterations</div></div></td><td>string</td><td>All output fileNames in preprocessing iteration are expanded with this variable prior to writing to disk</td></tr>
</table>
This program is <a class="groops-ref" href="general.parallelization.html">parallelized</a>.

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